package com.commerce;

import sun.net.www.http.HttpClient;

import javax.imageio.stream.FileImageOutputStream;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

/**
 * @author wyj
 * @Title:
 * @Description:
 */
public class Donw {


    /**
     * 测试
     * @param args
     */
    public static void main(String[] args) {
/*        for(int j = 1 ; j <20; j++) {
            for (int i = 1; i < 20; i++) {
                String url = "http://mhpic.mh51.com/comic/X%2F血族禁域%2F"+j+"话%2F"+i+".jpg-mht.middle.webp";
                byte[] btImg = getImageFromNetByUrl(url);
                if (null != btImg && btImg.length > 0) {
                    String fileName = j+"-"+i+".png";
                    writeImageToDisk(btImg, fileName);
                } else {
                    System.out.println("没有从该连接获得内容");
                }
            }
        }*/

        new Thread(() -> System.out.println("1123")).start();
    }
    /**
     * 将图片写入到磁盘
     * @param img 图片数据流
     * @param fileName 文件保存时的名称
     */
    public static void writeImageToDisk(byte[] img, String fileName){
        try {
            File file = new File("C:/Users/Administrator/Desktop/血族禁域/"+fileName);
            FileOutputStream fops = new FileOutputStream(file);
            fops.write(img);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 根据地址获得数据的字节流
     * @param strUrl 网络连接地址
     * @return
     */
    public static byte[] getImageFromNetByUrl(String strUrl){
        try {
            URL url = new URL(strUrl);
            HttpURLConnection conn = (HttpURLConnection)url.openConnection();
            conn.setRequestMethod("GET");
            conn.setConnectTimeout(5 * 1000);
            InputStream inStream = conn.getInputStream();//通过输入流获取图片数据
            byte[] btImg = readInputStream(inStream);//得到图片的二进制数据
            return btImg;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    /**
     * 从输入流中获取数据
     * @param inStream 输入流
     * @return
     * @throws Exception
     */
    public static byte[] readInputStream(InputStream inStream) throws Exception{
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = 0;
        while( (len=inStream.read(buffer)) != -1 ){
            outStream.write(buffer, 0, len);
        }
        inStream.close();
        return outStream.toByteArray();
    }

}
